<template>
    <div class="login_container">
        <el-row :gutter="0">
            <el-col :span="12" :xs="0"></el-col>
            <el-col :span="12" :xs="24">
                <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
                    <h1>Hello</h1>
                    <h2>欢迎来到damia甄选</h2>
                    <el-form-item prop="username">
                        <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input type="password" :prefix-icon="Lock" v-model="loginForm.password"
                            show-password></el-input>
                    </el-form-item>
                    <el-form-item>
                        <el-button :loading="loading" class="login_btn" type="primary" @click="login">登录</el-button>
                    </el-form-item>
                </el-form>
            </el-col>
        </el-row>
    </div>
</template>

<script setup lang='ts' name="Login">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue';
import { useRouter, useRoute } from 'vue-router';
import { ElNotification } from 'element-plus';
//引入用户相关的小仓库
import useUserStore from '@/store/modules/user';
//引入获取当前时间的工具函数
import { getTime } from '@/utils/time';
let useStore = useUserStore();
let $router = useRouter();
let $route = useRoute();
//定义变量控制按钮加载效果
let loading = ref(false)
//收集表单数据
let loginForm = reactive({ username: 'admin', password: '111111' })
//获取el-form组件
let loginForms = ref();
//登录按钮回调
const login = async () => {
    //保证全部表单项校验通过再发请求
    await loginForms.value.validate()
    loading.value = true
    try {
        //保证登陆成功
        await useStore.userLogin(loginForm);
        //判断登陆的时候，路径中是否有query参数，有就往参数跳，没有就跳首页
        let redirect: any = $route.query.redirect
        $router.push({
            path: redirect || '/',
        })
        //提示信息
        ElNotification({
            type: 'success',
            message: '欢迎回来',
            title: `HI,${getTime()}好`
        })
        loading.value = false
    } catch (error) {
        loading.value = false
        //提示信息
        ElNotification({
            type: 'error',
            message: (error as Error).message
        })
    }
}
//自定义校验规则函数
const validatorUserName = (rule: any, value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:表单元素文本内容
    //callback:如果符合条件callback通过放行
    //如果不符合条件callback方法,注入错误提示信息
    if (value.length >= 5) {
        callback();
    } else {
        callback(new Error('账号长度至少五位'))
    }
}
const validatorPassword = (rule: any, value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:表单元素文本内容
    //callback:如果符合条件callback通过放行
    //如果不符合条件callback方法,注入错误提示信息
    if (value.length >= 6) {
        callback();
    } else {
        callback(new Error('密码长度至少六位'))
    }
}
//表单校验的配置对象
const rules = {
    username: [
        { required: true, trigger: 'change', validator: validatorUserName }
    ],
    password: [
        { required: true, trigger: 'change', validator: validatorPassword }
    ]
}
</script>

<style scoped lang="scss">
.login_container {
    width: 100%;
    height: 100vh;
    background: url('@/assets/images/background.jpg') no-repeat;
    background-size: cover;

    .login_form {
        position: relative;
        width: 80%;
        top: 30vh;
        background: url('@/assets/images/login_form.png') no-repeat;
        background-size: cover;
        padding: 40px;

        h1 {
            color: white;
            font-size: 40px;
        }

        h2 {
            font-size: 20px;
            color: white;
            margin: 20px 0;
        }

        .login_btn {
            width: 100%
        }
    }
}
</style>